Then try to answer the question. If you are still having difficulty with the question, click on the EXPLANATION button.

“ChemTutor® Excalibur covers all major topics covered in college chemistry in good detail. The LEARN and EXPLANATION features are perfect. Having ‘learn’ and ‘explain’ as separate features allows the program to cater more precisely to a student’s needs.”

John G.A. Benton                                         University of Virginia